The longest 7 min video i have ever seen

POV: The legend Mrs Barnfield wants uses KZfaq videos to demonstrate cus she's hip with the kids.

POV: Mrs Barnfield has forced you to watch this video and summarise what it is about

thanks mr hoyland. totally needed this today.

Honestly just here because I nearly fell asleep watching this in my science lesson because it was so relaxing 💀

thank you for savinng my chemistry GCSE

They allow for seperate pathways through which you go from the same reactants to products with less activation energy. Solid catalysts like platinum and palladium hold the molecules of the reactants down so they can react more easily, and they then push off the products, something very important for good catalysts. Cataysts need not be solid as long as they make for a mechanism in which they're not used up. Fast colliding particles in the appropriate spatial orientation lead to reactions.

Why is porous pot catalyst used normally in this reaction? How exactly does it reduce the activation energy?

How the paraffin absorbed by the mineral cotton wool undergoes cracking to form these different organic compounds.

POV: u wanna watch attack on Titan but a certain teacher makes u watch this instead 🤬😔

I loved it, your science is very amazing!

love the video.What a watch!!!Extremely exciting.thanks kiddos

Why is the catalyst heated strongly before the oil is warmed ? would evaporate too quickly ?

Extremely useful! Thank you

Thank you for posting this video!

Awesome video. A very important petrochemical refinery cracking reaction in a test tube. Can anybody tell me what is difference between cracking and reforming? , as i often see the same type of catalyst and temp. are used in both cases and also product is sometimes similar.

does this mean that the silica gel powder from chromatography or a silica gel from shoe boxes can be used as catalyst?

Her voice makes me expect her any minute to start talking about the doctor and the Tardis.

what is the catalyst used in industries in cracking? what did she say?

Bare complicated words...

Link at the end of the video is unavaliable!

Agree strongly with Stephen - a Bunsen valve is easy to make and adds safety. About 3cm of rubber tubing that fits over the end of the delivery tube. Make a longitudinal slit in the tubing with a scalpel, about 1cm long and then plug the end of the rubber tubing with a short length of glass rod. NB if using bits of broken stirring rods, be very careful as they will have sharp edges that are best removed by polishing the broken surfaces in a hot Bunsen flame.

her voice is so professional and Discovery channel like

Thats very interesting. Mam can you kindly give us the procedure of isolating N decane from paraffin

Very relevant experiment to enhance the knowledge on hydrocarbons

Thanks! It help a lot

I understand how catalysts of this sort act, but I don't understand how this works as the catalysts sits to the bottom so the parafin doesn't necesarily goes through the stones

Wait. Isn't mineral wool the name for asbestos? Edit: Its not, but still not good to breath in

Hi, I intend to use ZSM-5 as catalyst for cracking Straight-run heavy naphtha (80-180 deg-C) to improve RONC. Please advice me this idea is good or not? What reactions will happen? What products will we receive? Best regards, Thanks!

U r magician !

but why cant we use cotton wool for this experiment?

I'm confused about the last conclusion made about the last tube: Is it alkane or alkene you meant? ALKANE with a carbon-carbon double bond is contradictory...

What gas is released?

may I beg your pardon! what is the name of that catalyst, the one that looks like chips?

i love cracking! (paraffin)

I love how she says you need a compatent assistent XD

thanks for sharing, good video, I have a couple of doubts, how hot should it be...? Why can't the catalyst and the paraffin be put together...? What happens if I put them together...? using alumina as a catalyst has the same effect...? Thank you for your help...

GREAT VIDEO

Ten years later,wow, it really helped me

why do we use mineral wool, both instead of normal wool or no wool?

omg dr wong, im ur biggest fan

excellent video.. i wish you can ellaborate more on the function of the catalyst.. some good comments below though.

very nice

What is the reason the alkanes are collected first before the alkenes? Thanks

For this experiment my chem class used Aluminium Oxide as a catalyst. I do understand that the catalyst decreases the amount of energy required to break the Carbon-Carbon bonds. however, how does it do so? Thanks

this is quality stuff here!

thank you

@mayblue119 click cc at the bottom of the screen and click transcribe audio

I dont really get the double bond thing.. is she saying that double bond solution comes with a liquid that when mixed w/ mineralized compound, will turn to colorless solution?

Could you also test for the presence of unsaturated hydrocarbons by passing it through hydrogen and weighing it before and after with a precise enough scale?

Is the pumice stone selected as a catalyst for its physical properties, or its chemical properties?

Wow very knowledgeable

Her voice is so satisfying ❤

I'm speedrunning life right now

Very interesting experiment and wonderful execution.

if your teacher asked you to make notes/summarise and you don't want to listen to the whole thing, click the three dots, then click 'open transcript'

Would this work with vegetable oil?

can we use this method to find adulteration of mineral oil in edible oil?

Stop seducing me with your knowledge of organic chemistry

POV: Dr Bell sent a link on smhw and told you to watch 2 videos

Can anyone send me a write up

Bel pezzo di chimica!

this is amazinggg!!!!

hello my question is:-pumice stone which is used to clean ankle of feet, can be used as a catalyst?

Because I'm definitely gonna need to know this, thank you so much government I'll use this every single day of my fucking life :)

thank you so much. this is a great video!

Gr8 video

Both the bromine and the permanganate can oxidize the hydrocarbons if they have double bonds. Since these oxidated compounds are colourless and their formation depletes the colourful reactant, you can witness the colour change. Eg: CH2=CH2 (colorless) + Br2 (orange) --> BrCH2-CH2Br (colorless) [ethylene + bromine --> 1,2-dibromoethane]

you need to activate the surface of the catalyst first.

5:50 i sniff it fully when its not a dangerously chemical xd

Great

Thank you mam

just so you know miss Kennedy, no one listened to this :)

i love her voice

*competent student*

@HCHalexfan its mineral wool and you can use cotton wool too

Nice

why does suck back occur?

Not what I expected

useful video despite the CRISP 240p

Bung? I call them stoppers (rubber stopper or glass stopper).

where is your lab GLOVE?

Personally I thought that was hot as hell.

thanks for posting ...

Isn't it illegal to produce crack in the UK?

Thanks for the help

my science teacher says you need to us ceramic wool not mineral wool

Burner, take care...

did it

This was extremely helpful, thank you very very much ^,^

Wooooooow

the transcript from 2:06 - 2:12 :')

And at 3:28... That's the best! "and you're going to heat a palestine"

You really shouldn't wear gold rings that nice in a chemistry lab. It would be a shame if some mercury got on them.

Why did she not wear gloves?

Staaaaa of david

POV: your at home bored af, and your already crap day has been made worse by being told to watch this

am i the only person in this comment section that thinks this is really cool

asmr

Juss you wayt, 'Enry 'Iggins, juss you wayt!